i just replaced my cassette and chain with new oens on my 9 speed drivetrain on my ells joker. i put on a pc59 chain and deore cassette to replace a 59 chain and a lx or xt cassette, i dunno. now whenever i crank hard the chain slips over the cassette. why?

btw, i hope this is the right section for this, they are so fucking confusing

are you visually observing the chain skip on the rear cogs? it could be that your freehub is hooped as well. when you apply power, the whole mechanism slips giving the illusion that your rear cogs/chain are slipping

Originally posted by UFO are you visually observing the chain skip on the rear cogs? it could be that your freehub is hooped as well. when you apply power, the whole mechanism slips giving the illusion that your rear cogs/chain are slipping

My brother had the EXACT same problem. He swore numerous times that it was skipping on the cassette, and that his freehub was pooched. Got a new wheels, new hub, still did it. Took it into JH, they couldn't fix it. Finally, I told him to get a new ring, he did, and it fixed it.

Does it happen whenever you put lots of pressure on it? Or is it kidna infrequent/only at a certain point in the pedal rotation?

I had the same problem on mine i swore the chain was sliping over the casette i tried everything i had perfect chain length everything new exept rear derailler so i got a new derailer, turns out my springs in my old derailer were all pooched so it looked right with a chain through it but without one it was just a limp peice of metal. sometimes a new rear derailer will tension your chain enough to help

my scream has started to do it, but only in my gears 6-9. so dirtjumping and stuff is annoying cuz i gotta pedal like mad in these tiny gears. im thinking if its like that it's my chainline but i'm not sure.

i took it to a shop and got it back and it skipped in every gear and this is the best i've gotten it since. im no expert on chainlines though